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A
For decoration
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B
To protect the client's skin and clothing and keep them comfortable and clean
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C
To make the cape look nice
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D
It is not necessary
Why this is the answer
Draping protects the client's skin and clothing from water, hair clippings, and chemicals, and keeps them comfortable and dry during the service. The correct drape depends on the service — for example, a different draping setup is used for shampooing, cutting, or chemical services to guard against moisture or chemical contact. Proper draping is both a courtesy and a safety/sanitation step. Using clean towels and capes for each client also supports infection control. Knowing why and how to drape is basic service-prep content.
Source: Hair Care — Draping